Hello lot,
I'll be disabling the Message Boards plugin within a week's time from today, due to concerns over a glitch that we cannot fix immediately. For the time being, an alternative can be made using the Bookshelf Display plugin. The Kraken's Den Inn is using the feature. Players can check the back of the message board and find a chest behind the bookshelf. You may insert or remove your own books, or at the request of the poster writer through the chest.
For any personal Message Boards, please remove your books by the end of this week and see if the Bookshelf Display method is better for you. We hope to return Message Boards in the future.
Post below if you have any questions.